Add File.kt

Author: mezpahlan

affectedmoduledetector/src/main/kotlin/com/dropbox/affectedmoduledetector/util/File.kt

@@ -0,0 +1,24 @@
+package com.dropbox.affectedmoduledetector.util
+
+import java.io.File
+
+/**
+ * Converts a [String] representation of a relative [File] path to sections based on the OS
+ * specific separator character.
+ */
+fun String.toPathSections(rootProjectDir: File, gitRootDir: File): List<String> {
+    val realSections = toOsSpecificPath()
+        .split(File.separatorChar)
+        .toMutableList()
+    val projectRelativeDirectorySections = rootProjectDir
+        .toRelativeString(gitRootDir)
+        .split(File.separatorChar)
+    for (directorySection in projectRelativeDirectorySections) {
+        if (realSections.isNotEmpty() && realSections.first() == directorySection) {
+            realSections.removeAt(0)
+        } else {
+            break
+        }
+    }
+    return realSections.toList()
+}